Improvement in dies for making sheet-lead



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NELSON YORK, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN DIES FOR MAKING SHEET-LEAD.

Specification forming partof Letters Patent No. 140,567, dated July 1,1873; application filed March 26, 1873.

To all whom it may concern:

Be it known that I, NELSON YORK, of Boston, in the county of Suffolk andState of Massachusetts, have invented a certain new and useful ImprovedConstruction and Application of Dies for the Manufacture of Lead andother Metals or Combination of Metals in Sheet Form; and that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying plate of drawings.

This invention relates to dies for the manufacture of lead and othermetals in a continuous sheet form by means of hydraulic pressure; andthe invention more particularly relates to the construction of both thedie and its block or holder. To this end the invention consists in thecombination of a slotted and recessed die-holder with a lineardie-blank, each so arranged for the die blank to be wedged in the recessof the die-block, as hereinafter fully described. It further consists ofcertain other improvements, too fully described hereinafter to needpreliminary explanation.

In the accompanying plates of drawings my invention is illustrated. InPlate 1, Figure l is a front elevation of the die-block and the cylinderof a press suitable ,for the manufacture of lead, using hydraulicpressure. Fig. 2 is a central vertical section in plane of line a: m,Fig. 1. In Plate 2, Fig. 3 is a plan view of the die-block with thecylinder removed. Figs. 4, 5, 6, 7, and 8 are severally plan views ofthe recess to die-block, showing modifications in the construction ofrecess and of arrangement of die-plates in the recess.

A in the drawings represents the die block or holder, and B thecylinder, of a press of the class to which this invention relates, thecylinder receiving the molten metal for being forced through the diecarried by the dieholder. The die-block and cylinder are fastenedtogether, the cylinder upon the block, by screw-bolts and nuts, so thatunder the ordinary operation of the press from hydraulic pressure thetwo move together, and as one. The lower portion of the die-block at oneside, 0, is open across the width of the block, to allow the lead in thesheet form in which it is made in the press to pass to the outside ofthe press, as is now the case in the ordinary leadpipe presses. D, theupper face of the die,- block with the cylinder B removed; a, a slot orelongated opening in upper face D of dieblock A. This slot (4 hasparallel sides and ends, and corresponds in the direction of its lengthto the line of open chamber Gin under part of die-block, and into suchchamber 0 it opens. Said slot at is somewhat below the dieblock face D,and at 'each side of it, in a direction along its length, the block A iscut away, making a channel or recess, or groove or way, E. This recessE, in all the figures except Fig. 8, is shown as open at each end, andin all its bottom face is parallel to the face D of die-block A, and isbounded from end to end by upright sides or walls b b, shown in Fig. 4as parallel with each other, but at an angle to the length of the slot aof die-block, in Figs. 5 and 6 as at a similar acute angle to said slotat, and in Fig. 7 by one edge, 1;, parallel with said slot at, and bythe other edge, N, as at an acute angle to slot at, running from a pointmidway, or nearly so, of the length of said slot in opposite directions,leaving the recess the narrower midway, or nearly so, between its twoends. F, the die plate or blank. This die-plate F is shown in Fig.8 asof and in one piece of metal, and in the other several figures, 2 to 7,inclusive, as of and in two parts or pieces, 0 and 01, respectively, inthe direction of its length.

In Figs. 2, 3, 4, and 5, the two parts a and d are shown as of a taperform end to end, and in Figs. 6 and 7 as straight and of even width fromend to end, and in all the several Figs. 2, 3, 4, and 5 the slot oropening fin and through the thickness of the die is made by cutting outthe edge of the die part c in contact with the edge of the die part 61,along the length of the central portion of such edge in Fig. 6, bysimilarly cutting out both contactedges of the two parts, and in Fig. 7by the interposition between and at both ends of the two die parts 0 andd of separating blocks or plates In Fig. 8 the die-blank, as beforestated, is one piece, and its outline, as well as that of the recess Eof the die-block A, is such that it is surrounded or bounded on allsides by the walls of the recess.

The several die plates or blanks shown in the several figures are all inthickness equal to the depth of the recess E in die-block A, so thatwhen the cylinder B is located upon the die-block it will rest and bearon the upper face of the dieplates.

By Figs. 4 and 5, wherein the die parts are of a taper from end to end,and the walls I) b of the recess E in die-block in the one instance,Fig. 4, parallel to each other, but angular to the slot a of die block,and in the other instance, Fig. 5, at an acute angle to each other andto said slot a, in order to bring the opening f of die-blank over slotto of die block the parts of the die-blank are inserted in the one case,Fig. 4, oppositely to each other-that is, the larger end of one part atthe smaller end of the other part, and vice versa-and in the other case,Fig. 5, correspondingly and similarly with each other-that is, thelarger ends and smaller ends side by side-and then, after suchinsertion, the two parts are driven along the length of the recess,under their arrangement in Fig. 4, the one in the opposite direction tothe other, and in Fig. 5 in the same direction, whereby the die-partsare wedged in the recess and thus firmly fixed and located againstaccidental displacement, making a close and tight joint between thecontiguous or contact edges of the two parts.

\Vith a construction of die-blank and a recess, E, therefor, such asshown in'both Figs. 4 and 5, the wedging of the die-blank in recess E isaccomplished by and through itself but in Figs. 6 and 7, where thedie-blank is straight and of even width, it is wedged by the use ofseparate and distinct wedge-pieces, h. The result and effect, however,in all the cases are the same. Although in the several figures, exceptFig. 8, the die-blank is shown in two parts, obviously in all therelative constructions of the die-blank and recess E, shown by theseveral figures as excepted above, the die-blank could be in one pieceand the same result obtained, except as to the arrangement andconstruction shown by Figs. 4: and 7, wherein separating-blocks areemployed.

Under every arrangement of die-blank F and recess E shown in thedrawings, and every equivalent therefor, the cylinder B of the presswhen located is to rest upon the upper face of the die-blank, thusbinding the blank to its seat in the recess of the die-holder in thedirection of its thickness, and in that way still further securing theblank against dislocation or movement. In the drawings this rest of thecylinder upon the die-blank is through a plate, H, forming a bottom, tothe chamber of cylinder B when the cylinder is in place. This plate,under the arrangement shown, fits between the raised parallel edges Z lof the die-block, resting upon the faces m, each side of the recess. Theplate is made of a suitable shape to cover and seal the joints of thedie-blank with the recess of die-block to the entrance of the moltenmetal thereto in the operation of the press, and it is made with a slotor opening, a, in suitable position for the molten metal to pass out ofthe cylinder and enter the slot of die-blank. Within the cylinder B itsbottom is made inclining toward its discharge-opening to the die-slot;or, in other words, tunnel-shape, as shown at 0, Fig. 2, moreparticularly thus in the operation of the press, securing an easier flowor movement of the metal toward the said dischargeopening a, andeconomizin g in power required to drive the molten metal through thedieopening.

With a hydraulic press adapted to mold molten metal-for instance,lead-such as is now used for the molding of lead pipe, adapted in theconstruction of its die-holder, its die-blank, and its cylinder,substantially as as shown and described herein, obviously, by theordinary operation of such a press, the molten metal or lead can bemolded into a sheet form of any desired continuity as to length and, asto thickness and width, of any desired degree or extent, the moltenmetal as fast as so molded passing out of the press at the opening inthe lower part of the block.

In lieu of wedging the die-blank into the recess of its holder or block,as has been herein described, screws may be arranged in the die-holder,as shown in Fig. 8, to act against the outside edges of the die-blank,pressing on the same in a direction across its width, and screws actingin this way may be employed as 'well with the wedging of the dieblankinto position; but a wedge construction and an arrangement of parts ofthemselves are deemed most preferable; and the extension of the dies tothe outside of the die-holder is also most preferable, as with simplyloosening the fastening of the cylinder to the die-block, which, as isobvious, will reduce the bind on the die-blank between it and thedie-holder, a die-blank can be removed and reinserted, or anotherinserted, as may be desired.

It is found desirable to flare or round off the edges of the die-slot,as shown in Fig. 2, as the molten metal then can pass the more freelythrough the die-slot; and, furthermore, it is intended, in case thedie-blank is in sections or parts, to mark them, so that in placing themin the dieblock its proper place, as regards the slot in die-block, maybe insured with readiness and certainty.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination of. a slotted and recessed die-holder with alinearly-slotted dieblank, each relatively constructed from end toendfor the die-blank to be wedged in the The above specification of myinvention recess of the die-block, substantially as heresigned by methis 4th day of March, A. D.

in described, for the purpose specified. 1873.

2. In combination with a slotted and re- NELSON YORK.

cessed die-holder, constructed as described, a v

die-blank made in two parts, from end to end, Witnesses:

and otherwise constructed and adapted to ALBERT W. BROWN,

secure a slot through the same, substantially G. W. WINNETT;

as set forth.

